"Apple has made, offered to sell, imported, used and/or sold in this judicial district and elsewhere in the United States, digital cameras that directly, contributorily, or by inducement infringe one or more of the patents-in-suit," the complaint alleges.

The company states that in 2003 it was awarded $25 million in a lawsuit against Sony Electronics and Sony Corporation of America regarding the same patents. In 2004, a jury awarded $34.7 million to St. Clair in its complaint against Canon USA. A separate 2004 suit against Fuji resulted in an award of $3 million in damages over the patents in question.

Other suits were filed against a variety of companies, including Nokia, Hewlett-Packard, Kodak, Verizon, Motorola, Sanyo, Research in Motion, to name a handful. In many of the complaints, including ones where damages were awarded, the defendants reportedly opted to enter into licensing agreements with St. Clair.

The complaint against Apple, the only named defendant in the suit, was filed Monday in a U.S. District Court in Delaware. St. Clair has alleged that it is entitled to damages for what it believes is Apple's violation of its four owned patents.

"The infringement by Apple of the patents-insuit has injured St. Clair and will cause St. Clair added irreparable injury and damage in the future unless Apple is enjoined from the infringing patents-in-suit," the complaint states.

The suit does not specify which hardware is believed to be in violation of the patents, whether it be iSight cameras on Macs, the point-and-shoot capabilities on the iPhone, or the video camera recently added to the iPod nano.

In its annual Form 10-K filing with the U.S. Securities and Exchange Commission for the fiscal year 2009, Apple stated it is currently defending itself from more than 47 patent infringement cases. Twenty-seven of those were filed during the 2009 fiscal year.

"Regardless of merit," Apple said, "responding to such claims can consume significant time and expense."